Plaster board



New. 11, 1924. 1,515,380

V c. R. BIRDSEY PLASTER BOARD Originai Filed Jan. 2, 1920 IVNVENTOR. C4, es aka s37 y A TTORNEYS.

bodying thisginvention.

Patented Novo ll, I924.

earnersires srras CHARLES BIRDSEY, OF HINSIDALE, ILLINOIS, ASSIGNOR T UNITED STATES GYPSUM COMPANY, OI CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PLASTER BOARD.

-Original application filed January 2, 1920, Serial No. 348,942. Divided and this application filed January To all whom it may concern:

Be it known that I, CHARLES R. Bmnsnr, a citizen of the United States, residing at Hinsdale, in the county of Du Page and State of Illinois, have invented certain-new and useful Improvements in Plaster Board, of which the following is a description.

My invention belongs t0 that general class of devices known as plaster board or the like, and relates particularly to a .type ofboardin which the plaster, plaster Paris or equivalent plastic material is substantially inclosed on both faces and onone or more edges. The invention has among its I objects the production of an improved board which will be simple, substantial, durable, satisfactory and efficient, and which may be economically and accurately manufactured,

and in which the edges may be perfectly 0 formed to correspondto a definite specification as to size and shape. Many other objects and advantages of the construction herein shown and described willbe obvious to those skilled in theart from the disclosure herein given.

To thisend my invention consists of the novel construction, arrangement and coinbinatioi of parts herein shown and described and more particularly pointed out in the 0 claims. e I

In the drawing, the figure is a perspective view partly in section of a plaster board em- It may be mentioned that the present application is a divisional applicationof my application Serial No. 348,942, filed January 2, 1920, which matured into Patent 1,395,032 on October 25, 1921.

Referring to the example plaster, plaster Paris, or any equivalent material adapted *for the purpose, which may be handled preferably in a plas tic state and thereafter allowed to 'set or harden. The body 1 is inclosed betweenthe covering sheets 2 and 3 of suitable material, and it maybe mentioned that I have found paper of the desired width or thickness very satisfactory forthe purpose.

a In this construct1on,-4 represents the edge binder, which is folded over as at 5 so as to overlie the body, the same. being positioned on the exterior, as shown, or on the interior of the covering sheets, as may be. desired.

Serial No. 434,652.

as at 6 so as to produce a straight edge or corner. The edge 7 of the side portion l may engage with the sheet 2, as shown, or abut at the edge thereof. In this particular case the binder is secured in place by the plaster 8 or body material, or its equivalent, and may also be secured at the edge 7 by the material 9 or its equivalent for the purpose.

It will be noted that the edge is substantially completely inclosed, it being understood that the same may be so provided or constructed at one or both or all edges. Obviously, where eachsheet is integral and wrapped over atone edge, then only one edge need be inclosed, as hereinafter set forth. 'i he resulting product has a straight, smooth, finished edge, and at a desired and perfect angle, the board being'uniform in width and of a uniform appearance throughout its length. Ihe completed product has many advantages, including increased strength'and .durability and improved appearance In case of hand-ling, the edges are protected, and there is no breaking away nor sifting'out or powdering of the body at the edge.

. Having thus described my invention, it is obvious that various immaterial modlfications may be made in the same v without departing from the spirit of my invention;

hence I do not wish to be understood as limiting myself to the exact form, constructioned.

What I claim as new and deslre to secure by Letters Patent is: drawing, 1 represents a suitable body of suitable material, as for 1. A plastic board comprising a suitable body, a cover sheet arranged on opposite face sides thereof, and an edge binder adhering to the edge and folded to overlie the body on one side only thereof. and secured to the cover sheet thereat.

2. A plaster board comprising a suitable body, a-cover sheet arranged on opposite face sides thereof, and an edge binder adhering to the edge between the cover sheets and 4 folded to overlie the body on one side only thereof and secured to the exterior of the cover sheet thereat.

3. A plaster board of the kind described,

comprising a suitable body, a cover sheet arranged at each face thereof, and an edge rel ase v v binder arrangedat the edge and adhering thereto, said binder'foided in to overlie the body at the exterior of one cover sheet only and secured thereto.-

' 5 4. A plaster board of the kind described,

comprising a suitable body, a cover sheet arranged at each face thereof, and an edge binder arranged at each of the opposite edges and adhering thereto, said binder fold- 1e ed in to, overlie the body at the exterior of one of the cover sheets only and secured d described,

} thereto,

5. A plaster board of the la comprising a suitable body, a cover sheet arranged at each face thereof, and an edge 15 binder arranged at opposite edges and adhering thereto, said binders folded to overlie the body at the exterior of one of the coyer sheets only and secured thereto.

In testimony whereofil have hereunto Rex W, Hnin, v BERTJBEA HAJPQMANN. 

